MPCNC drag knife/pen holder

*** NOTE: I HAVE NOT PRINTED AND TESTED THIS. THIS IS A PAPER DESIGN. IF YOU PRINT THIS, PLEASE LEAVE FEEDBACK AS TO WHAT WORKED AND WHAT DID NOT WORK. ***

This is a carriage for the MPCNC (525 mount) that is designed to hold a tool such as a drag knife or a pen, and use an elastic band to provide the force to hold the tool to the work.

I found the mounts provided by V1 Engineering to be a little too "floppy" in the X and Y axes for my tastes, so I designed this one based on one created by Tech2C for the HyperCube: https://www.youtube.com/watch?v=HciNR-tskwQ

There is no actual tool holder included (yet), just the movable carriage. Attachments for the carriage should be simple to create using the below values.

The holes in the carriage are 14mm apart, and are 3.4 mm in diameter, which should fit an M3 screw comfortably but not at all loose. The carriage itself is 24mm tall and 46mm wide.